题解 | #统计字符#

import Foundation

while let line = readLine() {
   var array = [0,0,0,0]

   for ch in line {
      if ch.isLetter {
        array[0] += 1
      } else if ch == " " {
        array[1] += 1
      } else if ch.isNumber {
        array[2] += 1
      } else {
        array[3] += 1
      }

   }

   for count in array {
    print(String(count))
   }






   
}